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Method for preparing titanium oxide nano powder at low temperature by non-water-precipitation process

A nano-powder and titanium oxide technology, which is applied in the direction of titanium dioxide, chemical instruments and methods, titanium oxide/hydroxide, etc., can solve the problems of high toxicity of raw materials, serious agglomeration of titanium oxide nano-powders, and difficult and violent reactions. Good uniformity, shortened production cycle, and improved powder quality

Active Publication Date: 2017-02-01
JINGDEZHEN CERAMIC INSTITUTE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned non-hydrolytic sol-gel method has disadvantages such as high toxicity of raw materials, severe reaction difficult to control, serious agglomeration of titanium oxide nanopowder, etc.

Method used

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  • Method for preparing titanium oxide nano powder at low temperature by non-water-precipitation process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Anhydrous ethanol is used as a solvent, butyl titanate is used as a titanium source, and anhydrous formic acid is used as a catalyst. Take 200mL of absolute ethanol and place it in a Erlenmeyer flask, add 12mL of butyl titanate, stir evenly, add 4mL of anhydrous formic acid, and then start heating in an oil bath. The slurry was aged at 80 °C for 24 h, then the solvent was removed by centrifugation and recovered, and finally the wet precipitate was dried to obtain titanium oxide nanopowder.

Embodiment 2

[0020] Anhydrous methanol is used as a solvent, ethyl titanate is used as a titanium source, and anhydrous acetic acid is used as a catalyst. Take 100mL of anhydrous methanol and place it in a conical flask, add 20mL of ethyl titanate, stir evenly, add 4mL of anhydrous acetic acid, and then start heating in an oil bath. The slurry was aged at 60 °C for 12 h, then the solvent was removed by suction filtration and recovered, and finally the wet precipitate was dried to obtain titanium oxide nanopowder.

Embodiment 3

[0022] Anhydrous isopropanol is used as solvent, isopropyl titanate is used as titanium source, and anhydrous formic acid is used as catalyst. Take 100mL of anhydrous isopropanol in a conical flask, add 4mL of isopropyl titanate, stir evenly, add 1mL of anhydrous formic acid and start heating in an oil bath, control the temperature of the oil bath to 60 °C, and the precipitation reaction is complete Finally, the precipitated slurry was aged at a temperature of 75 °C for 4 hours, and then the solvent was removed by a filter press process and recovered, and finally the wet precipitated material was dried to obtain titanium oxide nanopowder.

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Abstract

The invention discloses a method for preparing titanium oxide nano powder at low temperature by a non-water-precipitation process. The method comprises the following steps: taking a proper amount of oxygen donor alcohol as a solvent, dissolving a certain amount of titanium source in the oxygen donor alcohol, stirring uniformly, adding an anhydrous low-carbon organic acid as a catalyst, carrying out oil-bath heating until the precipitation reaction is complete, carrying out aging and solvent removal treatment on the precipitated slurry, and finally, drying the wet precipitated material to obtain the nano titanium oxide powder. The method has the outstanding characteristics of simple process, low control requirements, short preparation period, no pollution and the like, and thus, has wide application prospects.

Description

technical field [0001] The invention belongs to the technical field of inorganic material preparation, and in particular relates to a method for preparing titanium oxide nanometer powder at low temperature through a non-aqueous precipitation process. Background technique [0002] Titanium oxide is an important semiconductor photocatalytic material, which has the characteristics of high photocatalytic activity, strong oxidation ability, stable chemical properties, chemical corrosion resistance, cheap and non-toxic. Titanium oxide has three crystal forms: anatase, rutile, and brookite, and the photocatalysts are mainly anatase and rutile, and the rutile phase structure is the most stable crystal phase in thermodynamics. Moreover, the performance of titanium oxide is closely related to its crystal form, particle size, dispersion and crystallinity. Nano powder has many special properties, such as: surface effect, volume effect, quantum size effect, macroscopic quantum tunneling...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/053B82Y30/00
CPCB82Y30/00C01G23/053C01G23/0536
Inventor 冯果徐贵荣江伟辉刘健敏张权吴倩苗立锋
Owner JINGDEZHEN CERAMIC INSTITUTE
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